The invention provides a visible trachea cannula hard lens for airway surface anesthesia. The visible trachea cannula hard lens is characterized by comprising a display, a hard lens handle, a high-pressure bottle and a stainless steel tube. The high-pressure bottle is arranged in the hard lens handle, and a camera shooting unit and a spray head are arranged at the front end of the stainless steeltube; the high-pressure bottle is filled with local anesthesia liquid medicine and high-pressure gas, a bottle valve is arranged at the bottom end of the high-pressure bottle, and the high-pressure bottle can be installed in a medicine bin of the hard lens handle; a local anesthesia liquid medicine conveying pipeline is arranged in the stainless steel tube, one end of the local anesthesia liquid medicine conveying pipeline is connected with the spray head, and the other end of the local anesthesia liquid medicine conveying pipeline is connected with the bottle valve through a tail pipe; and aspraying key is arranged at the front end of the hard lens handle, and the gas in the high-pressure bottle can be triggered by pressing the spraying key to push the local anesthesia liquid medicine tobe sprayed out through the spray head. The visible trachea cannula hard lens can perform surface anesthesia on any part in a visible range, enables an anesthesia effect to be accurate, reliable and controllable, is especially suitable for trachea cannula operation of difficult airway patients with poor head and neck mobility, head and neck trauma, small mouth opening degree, obesity, short neck,high glottis and the like, can be operated by a single person and is low in manufacturing cost.